During the beginning of the episode when Chihiro is telling the viewer about how he’s always dreamed of having a zombie girlfriend, the scene cuts away to a zombie pig-tailed girl in a suit. In the following scenes we see Chihiro dressed in a white dress shirt (with a red stain on it) and red tie holding a cricket bat.

This outfit comes directly from the popular horror-comedy zombie film, Shaun of the Dead where the main character, Shaun wears a similar outfit with a red stain on his shirt caused by a pen (plus his name tag since it’s a work uniform). Shaun also uses a cricket bat as his signature weapon after finding out how surprisingly ineffective records are at killing zombies.